8 (10).ppt - Unit C Refers to chromosome number Haploid(half Diploid(full set Polyploidy(many sets A haploid(n sperm cell unites with a haploid(n egg

8 (10).ppt - Unit C Refers to chromosome number...

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Unit C
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Refers to chromosome number Haploid (half) Diploid (full set) Polyploidy (many sets
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A haploid (n) sperm cell unites with a haploid (n) egg cell (23 +23)
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A diploid (2n) zygote is produced = (46) A multicellular organism is created through mitotic divisions
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The Offspring : carry genetic information from each parent
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They are: similar in size & shape carry the similar genes In pairs (there are 23 in body cells) which is 46 chromosomes in total
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Come together when the nucleus of the sperm & egg unite Consist of 1 chromosome from each parent
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Homologous Chromosomes Homologous Chromosomes
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The 1 st 22 pairs are autosomes The 23 rd pair are sex chromosomes …… which determine gender Note: the sex chromosomes for males are not homologous
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Chromosomes replicate (S phase) Chromosomes are uncondensed and are called chromatin
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